The Graphite Modular 5x4 12U Fastener Insert Pack helps turn a larger storage box into a cleaner, better-structured hardware organiser. It is ideal for users who want screws, fixings, and small workshop parts grouped more logically while keeping the same modular storage language across the full Graphite Modular range. Product imagery currently reuses the 6U insert visuals as a representative reference, but this product is sized for the 5x4 12U format.